<?php

/* 
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */

//$string = "Learn PHP string functions at jb51.net";
//$lower = strtolower($string);
//$upper = strtoupper($string);
//print("$lower\n");
//print("$upper\n");


$string1 = "带中文Learn PHP string functions at jb51.net";
$lower1 = strtolower($string1);
$upper1 = strtoupper($string1);
echo $lower1."<br>";
echo $upper1."<br>";